Serial to Ethernet Connector is described as 'allows you to share up to 255 serial port devices over a TCP/IP network turning your computer into a low-cost terminal server' and is an app in the Network & Admin category. There are three alternatives to Serial to Ethernet Connector for Windows. The best alternative is Null-modem emulator, which is both free and Open Source. Other great apps like Serial to Ethernet Connector are TCP/Com (Paid) and HW Virtual Serial Port (Free Personal).
The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. You can create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another.
Multifunction serial to ethernet (and ethernet to serial) interface software. Easily access a serial device via a TCP/IP or UDP network or redirect Ethernet/IP data to real or “Virtual” RS232 serial ports.
HW VSP is a software driver that adds a virtual serial port (e.g. COM5) to the operating system and redirects the data from this port via a TCP/IP network to another hardware interface, which is specified by its IP address and port number.